This work presents Ni S/graphene/carbon nanotube(Ni S/GNS/CNT) composites as electrode material for the supercapacitor application in sea flashing signal systems. Ni S nanosheets were closely anchored on the conductive GNS-CNT networks. As a result, the Ni S/GNS/CNT electrode showed a high specific capacitance of 2377F·g-1 at 2m V·s-1 and good cycling stability compared with the pure Ni S(1599F·g-1). The enhanced electrochemical performances are attributed to the synergetic effect between the conductive carbon and the pseudo-capacitive Ni S. The high performance supercapacitor may provide application in the sea flashing signal system. This work presents Ni S / graphene / carbon nanotube (Ni S / GNS / CNT) composites as electrode material for the supercapacitor application in sea flashing signal systems. Ni S nanosheets were closely anchored on the conductive GNS-CNT networks. As a result, The Ni S / GNS / CNT electrode showed a high specific capacitance of 2377F · g-1 at 2m V · s-1 and good cycling stability compared with the pure Ni S (1599F · g-1). The enhanced electrochemical performances are attributed to the synergetic effect between the conductive carbon and the pseudo-capacitive Ni S. The high performance supercapacitor may provide application in the sea flashing signal system.